Numbers / 147

The Number 147

147 is composite: factorization 3 × 7^2. That gives 147 exactly 6 divisors: 1, 3, 7, 21, 49, 147. 147's proper divisors total just 81, 66 short of 147, the deficient case most of 147's neighbors share too. 147 has a digit sum of 12; for 147, the digital root works out to 3. 147: 3, 7 all divide 147 evenly, out of 2-12. 147 is 10010011 in binary and 93 in hex; as a Roman numeral it's CXLVII.